Vaginal inching. What treatment to take.

I m breastfeeding a 28 days old baby whom I gave birth ceaserean...I m having vaginal itching since 1 year...no discharge, nothing only itching inside labia majora and around hole of vagina and sometimes vulva...I have taken treatment of prolactin before my pregnancy so I thought this itching is becoz of dryness due to increase in prolactin but then I got pregnant...this problem continued through whole pregnancy for which my Dr. Thought it's infection so he gave me clotrimZole vaginal gel and also suppositories but then also itching is there. No other problem only severe itching that it makes me irritate and I scratch so much that it burns and skin gets u understand what I want to say. When I scratch then the itching stops. The itching occurs three time in day and three times at night then I scratch and itching stops but skin gets inflamed.plz tell is it skin problem or what treatment to take.